@article{10_4064_sm_71_2_203_221,
     author = {Rodrigo Arocena},
     title = {A refinement of the {Helson-Szeg\"o} theorem and the determination of the extremal measures},
     journal = {Studia Mathematica},
     pages = {203--221},
     publisher = {mathdoc},
     volume = {71},
     number = {2},
     year = {1981},
     doi = {10.4064/sm-71-2-203-221},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-71-2-203-221/}
}